4 Round Detachable Box Magazine. Fits All FN TSR™ XP, PBR, and FN SPR™ rifles with Detachable Box Magazines (DBM) chambered in 308 Win.For a quicker reload from pocket or pack, make sure you have extra factory magazines for your FN SPR™ rifles. They feature steel bodies for durability and low-friction followers for smoother feeding.
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